KAOLIN CLAY PURIFICATION BY DRY HIGH GRADIENT MAGNETIC SEPARATION
(1.Central South University of Technology; Changsha 410083;China;
2.Changsha Research Institute of Mining and Metallurgy)
2.Changsha Research Institute of Mining and Metallurgy)
Abstract: A new method-dry High Gradient Magnetic Separation (HGMS)-to remove iron from ultrafine kaolin powder is described. A new kind of disperser, which breaks down the particle clusters in the powder by high speed gas flow from an air compressor, is used to completely disperse the powders. The dispersed particles are passed through vibrating HGMS by a vacuum pump to remove the iron. The magnetic and nonmagnetic fractions are separately collected by cloth collectors. Dry HGMS laboratory experiments are carried out. A product containing 0.90％ Fe2O3 was obtained, and the recovery was 70％.
Key words: magnetic separation kaolin purification dry high gradient magnetic separator